Headboard



FIG. 1 is a front perspective view of the design of the headboard;

FIG. 2 is a front elevation view of the design of FIG. 1;

FIG. 3 is a rear elevation view of the design of FIG. 1;

FIG. 4 is a top plan view of the design of FIG. 1;

FIG. 5 is a bottom plan view of the design of FIG. 1;

FIG. 6 is a first side elevation view of the design of FIG. 1, with the opposite, second side elevation view being a mirror image of the first side elevation view; and,

FIG. 7 is a rear perspective view of the design of FIG. 1.

The features shown in broken lines depict environmental subject matter only and form no part of claimed design. 

CLAIM I claim the ornamental design for a headboard, as shown and described. 